It depends on where that form is living. If the page it's on is in HubSpot the page uses a 12 column layout (the entire page is 12 "sections" from left to right. You can change how wide your form is on the template in the design manager. Layout Editor Article
The layout of the form itself (including the number of cols) is done in the form editor. You can add all of the fields you like then drag and drop using the blue handle to move the fields. This way you can have two or three fields on the same line. Create a Form Article
It depends on where that form is living. If the page it's on is in HubSpot the page uses a 12 column layout (the entire page is 12 "sections" from left to right. You can change how wide your form is on the template in the design manager. Layout Editor Article
The layout of the form itself (including the number of cols) is done in the form editor. You can add all of the fields you like then drag and drop using the blue handle to move the fields. This way you can have two or three fields on the same line. Create a Form Article